WASHINGTON (AP) — House and Senate negotiators on Thursday unveiled a compromise bill that authorizes billions of dollars for water projects over the next decade, from flood protections in California to port deepening in Georgia's rapidly growing Port of Savannah.

Lawmakers released details of the Water Resources Reform and Development act a week after they announced a tentative agreement on legislation that blends House and Senate versions of the bill. The legislation will authorize 34 projects in virtually every region of the country. Lawmakers say it provides important investment in the nation's water infrastructure.

The Senate passed its version of the bill roughly a year ago, with the House following suit in October. Since then, lawmakers have been working to thrash out differences between the two bills. The Senate's version would authorize about $12.5 billion over the next decade, while the House's version would cost about $8.2 billion. The compromise is expected to land somewhere in between the two, but a Congressional Budget Office estimate was not yet available.

Congress would have to pass separate legislation to pay for all of the projects included in the bill.

The House is expected to vote on the bill as early as Tuesday, with the Senate following suit. Both versions of the bill easily passed previously. With the estimated cost of the bill expected to rise, though, there is some concern that more conservative Republicans might vote against it. Outside groups, including Heritage Action, have said the bill does not do enough to rein in spending.

But businesses groups -- and many lawmakers -- have called both versions of the bill a potential jobs engine, citing the investment in infrastructure. The Chamber of Commerce has also lobbied lawmakers in both houses to pass the bill, saying it will ensure that American businesses stay competitive.

One effort to try to keep conservative lawmakers on board is preserved in the compromise. Addressing past concerns that water projects bills were loaded with favors for lawmakers' districts and states, the compromise legislation eliminates roughly $18 billion in dormant projects that were authorized prior to 2007.

The bill also sets specific time and cost limits for studies on potential projects, eliminates duplicative reviews and includes language that speeds up the environmental review process for projects.